de laval



2 Sheets-Sheet 1.

(No Model.)

Patented Jan. 8, "1895 Inn/5.95 walzfln \\u/ u -J/ l/mwrm 61 V 22226 57%M Arron 29.

"m: upams wzrzns co P-HOYO-LITHO" WASHINGYON, n. c,

2 Sheet-$heet 2.

(No Model.)

0. G.-P. DE LAVAL. STEAM 0R GAS TURBINE WHEEL.

Patented Jan, 8, 1895.

m: Noflms PETERS co moron-mo" msnmmou, u. c.

' UNITED- STATES PATENT ()FFICE.

CARL GUSTAF PATRIK DE LAVAL, OE STOCKHOLM, SXVEDEN.

STEAM oR GAS TURBINE WHEEL.

SPECIFICATION forming part of Letters Patent No. 532,232, dated January8, 1895.

A plication filed August 13, 1892. Serial No. 442,997. (No model.)Patented in Sweden February 2- 1892,No.4,406 in England February 2,1892, No. 13,770,- in Germany June 22,1892,N0. 68,359; in France July29,1892,-No. 223,322; in Belgium. August 1, 1892, No. 100,761; inSwitzerland Augw Nuibjfigjin Norway August 1,1892, No. 3,137; in SpainSeptember 20. 1892, No. 13,592; in Finland J'une 7,1893.No.464; in NewSouth Wales November 7,1893,No.4,718; in South Australia November 7,1893, No. 2,592: in Queensland November 8, 1893, No. 2,497, and in NewZealand November 11,

To aZZ whom it may concern.-

Be it known that I, CARL GUSTAF PATRIK DE LAVAL, a subject of the Kingof Sweden and Norway, residing at Stockholm, Sweden, have inventedcertain new and useful Improvements in Steam or Gas Turbine Wheels, (forwhich I have obtained a patent in Sweden, No. 4,406, dated February 2,1892; in Germany, No. 68,359, dated June 22, 1892; in England, No.13,770, dated February 2, 1892; in France, No. 223,322, dated July 29,1892; in Belgium, No. 100,761, dated August 1, 1892; in Spain, No.13,592, dated September 20, 1892; in Switzerland, No. 5,733,datedAu'gust 1, 1892; in Norway, No. 3,137, dated August 1, 1892; inFinland, No. 464, dated June 7, 1893; in New South Vales, No. 4,718,dated November 7, 1893; in Queensland, No. 2,497, dated November 8,1893; in South Australia, No. 2,592, dated November 7, 1893, and in NewZealand, No. 6,538, dated November 11, 1893,) of which the following isa specification.

The present invention refers to certain improvements in steam or gasturbine-wheels, and has for its object to provide the turbinewheel witha large number of buckets of any desired size and shape.

The invention consists of a steam or gas turbine-wheel, the body ofwhich is made of two disks or plates and provided with detachablebuckets, which buckets are secured into the circumferentially-recessedbody of the tur- V bins-wheel in any convenient manner.

The invention consists further of certain details of construction andcombination of parts, which will be fully described and finally pointedout in the claims.

In the accompanying drawings,-Figure 1 is a side-view of my improvedturbine-wheel, showing some of the buckets in section. Fig. 2 is avertical transverse section of the wheel. Fig. 3 is a section on theline 1-2 of Fig. 1. Fig. 4 is an end view of a few buckets, and Figs. 5and 6 show respectively the turbine with its wheel in side-elevation apart being broken away, and a horizontal section on line bb, Fig. 5.

Similar letters of reference indicate corresponding parts.

A B,is the body of the turbine-Wheel, which is mounted on the shaft D,and supported in suitable journal-bearings D D on the easiug D D M isthe inlet-port or nozzle for the steam or other expansive fluid, settingthe wheel in motion during its passage transversely through the spacebetween the buckets F.

O is the outlet for the fluid, Which is made large enough for providingfor the free exit of the steam.

The body of the turbine-wheel is made in two disks, A and B, each ofthem being thicker at the center and held together by means of a fixednut O, at one end of a shaft D, which passes through the center of thewheel, and a detachable nut E, which is screwed on to the other end ofsaid shaft. The inside of each disk A and B is provided with a recessnear the circumference, which recesses, when the disks are screwedtogether, form a deep groove, in which the buckets F may be inserted andsecured. For this purpose each bucket is provided with a shank or stemE, the size of which corresponds with the dimensions of the aforesaidgroove. The buckets themselves are of concave-convex shape, incross-section only as is usually employed for this class of wheels.

For the'purpose of obtaining a closed channel for the fluid, runningtransversely through the turbine-wheel, the buckets may, if desired, beprovided with a projection or abutment F at the outer ends.

In order to prevent the buckets from radial dislocation outward, whichthey would be liable to by the centrifugal force and insufficientfastening of the disks A and B, the shanks or stems F may be madebroader at the base than higher up near the curved portion forming thebuckets, and the inside in the recess of each disk A or B turned outsoas to fit, as shown in dotted lines, Fig. 2 or, v

as shown in full lines in the drawings, the shanks or stems F may beprovided with a in three parts, namely: of two disks like A and B, andof a plate inserted between them as shown also in dotted lines, Fig. 2.In this way, the disks A and 13 do not require to be turned out in orderto produce a deep groove between them for the purpose of securing thebuckets, but need only be provided with concentric grooves near thecircumference in order to hold the shanks of the buckets. The recess atthe circumference is obtained by interposing the aforesaid plate betweenthe disks A and B. It is evident, without special illustration that theparts may also be held together at the circumference instead of at thecenter of the wheel, as shown.

It is obvious that various other means for securing the buckets in thewheel may be resorted to, Without departing from the spirit and scope ofmy invention, and I do not therefore limit myself to the exactconstruction shown.

Having now particularly described my in vention, I claim as new anddesire to secure by Letters Patent- 1. The combination, with the body ofa steam or gas turbine-wheel having a circumferentialrecess andconcentric ribs in the faces of said recess, of a series of separatebuckets arranged closely together and provided with notched shanks,engaged by the concentric ribs on said recess, and provided at theirouter ends with projections or abutments which are placed in contactwith each other, substantially as set forth.

2. The combination, with the body of a steam or gas turbine-Wheel,formed of two disks or plates having a circumferential recess andconcentric ribs in the faces of said recess, of a series of separatebuckets arranged closely together and provided with notched shanks orstems engaged by the concentric ribs in said recess, and provided attheir outer ends with projections or abutments which are placed incontact with each other, and means for securing said disks together,substantially as set forth.

3. The combination, with the body of a steam or gas turbine-wheel,formed of two disks or plates, being thicker at the center and having acircumferential recess and concentric ribs in the faces of said recess,ofa series of separate buckets arranged closely together and providedwith notched shanks engaged by the concentric ribs in said recess, andprovided at their outer ends with projections or abutments which areplaced in contact with each other, a fixed nut at one end of a shaftpassing through the center of the wheel, and a detachable nut screwedonto the other end of said shaft, substantially as set forth.

In testimony that I claim the foregoing as my invention I have signed myname in presenceof two subscribing witnesses.

CARL GUSTAF PATRIK DE LAVAL.

Witnesses:

TvoKo RoBsAHoN, CARL WANLOO.

